JPH0640388Y2 - Shut-off valve built-in stop valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a shutoff valve built-in shutoff valve in which a gas shutoff valve function is integrally assembled with a shutoff valve.

<Prior art> A cock-type shutoff valve is generally provided at the end of a gas pipe as a main valve for indoor use, and a nipple protruding at the tip of this shutoff valve is connected to a gas appliance via a hose to open / close the cock. The gas supply to the gas appliance is cut off by.

On the other hand, the gas shutoff valve shuts off gas by driving a solenoid in response to an alarm output of a detector such as a gas leak alarm, and various structures are known.

Further, since the shutoff valve and the gas leak alarm device have been recently recommended for practical use, they are often incorporated into existing pipes afterwards except for new construction.

In other words, the shutoff valve is connected in the middle of the existing pipe according to the order of the owner when the safety is further enhanced with the addition of the gas leak alarm.

<< Problems to be solved by the device >> However, in this case, the piping connection work is troublesome,
Since the number of connecting parts is increased, reliability and piping strength in this part are reduced, and extra costs such as construction costs are required.

In addition, in order to avoid complicated relations with kitchen equipment, etc., and complicated indoor conditions, as a general rule, only the cock type shutoff valve is provided on the indoor side, so the gas shutoff valve is inevitable. Must be installed only outdoors.

Therefore, in order to install the gas shutoff valve outdoors and interlock it with the alarm device on the indoor side, the wiring must be pulled out outdoors, and work such as making holes in the outer wall is included, so wiring wiring and appearance processing etc. Was also troublesome.

The present invention solves the above problems, and by assembling a shutoff valve with a gas shutoff valve function, parts of both mechanisms are shared, which simplifies the mechanism and simplifies piping connection work. Reliability and increased number of connections,
The purpose is to prevent deterioration of pipe strength.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention has a cock that opens and closes a gas flow path in a valve housing by a manual operation, and uses the gas based on an abnormal signal from the outside. A shut-off valve built-in shut-off valve having a shut-off valve that opens and closes a flow path via a valve seat, comprising the shut-off valve and a reset rod arranged in the valve housing so as to face the shut-off valve. Is a valve body provided so as to face the valve seat, a plunger for guiding the valve body in a direction in which the valve body separates from and comes into contact with the valve seat, and a state in which the valve body is separated from the valve seat via the plunger. A magnet for holding, an auxiliary spring for urging the valve body to abut against the valve seat, and an auxiliary spring provided outside the valve housing for neutralizing the magnetic force of the magnet in the event of an abnormality, thereby the auxiliary Sprit And a solenoid that brings the valve element into contact with the valve seat by a biasing force of a ring, and the reset rod extends in a direction opposite to the plunger with one end of the reset rod facing the valve element. It is provided movably in the axial direction with the end portion exposed to the outside of the valve housing, and is configured to press and move the valve body to a position where it can be held by the magnet by a pressing operation from the outside. Characterize.

<< Operation >> Since the shutoff valve built-in shutoff valve described above is used as a shutoff valve,
No pipe connection is required, and installation is completed simply by screwing and fixing it to the end of the indoor gas pipe. Wiring work is easy because the wiring for interlocking with the gas leak alarm is only required indoors.

<< Embodiment >> An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an explanatory view of gas piping using a shutoff valve built-in shutoff valve (hereinafter simply referred to as shutoff valve) 1 according to the present invention, and FIG. 2 is a sectional view of the shutoff valve 1.

First, in FIG. 1, a gas cylinder 2, a pressure regulator 3 and a gas meter 4 are connected outdoors in series via a gas pipe 5. The gas pipe 5 on the discharge side of the gas meter 4 is drawn into the room R through the outer wall 6, and the shut-off valve 1 is connected to the supply end of the pipe by piping.

A gas hob and other gas appliances 8 are connected to the discharge port of the stop valve 1 via a rubber hose 7. A detector 9 such as a gas leak alarm is arranged near the gas appliance 8, and a signal cable 10 thereof is connected to the shutoff valve 1.

Incidentally, the conventional gas cutoff valve unit that interlocks with the detector 9 is generally connected to the outdoor gas pipe 5 surrounded by A in FIG. 1 due to the connection space. The cable 10 was also arranged to pass through the outer wall 6.

As shown in FIG. 2, the shut-off valve 1 is a gas discharge port for connecting a gas supply port 101 threadedly connected to a gas pipe to one end and press-fitting the rubber pipe 7 to the other end to connect to a gas appliance 8.
A valve housing 103 in which the respective 102 are formed, and a valve housing 10
In the center of 3, the cock portion 104 for partitioning the gas into the upstream side and the downstream side, the valve seat formed in the vertical gas passage 105 on the gas downstream side partitioned by the cock portion 104, that is, the nozzle portion 106, and the nozzle On the gas upstream side of the portion 106, that is, the solenoid 108 fixed to the lower surface of the valve housing 103 with the valve body 107 facing the lower part, the lower end is opposed to the valve body 107, and the upper end is the upper part of the valve housing 103. The reset rod 109 is made to protrude and is generally configured.

The cock portion 104 includes a ball 111, which is rotatably fitted in a pair of ball seals 110 fixed in the housing 103, and a lower end of which is coupled to the ball 111.
Provided on the outer periphery of the operating shaft 113, an operating shaft 113 coupled to the upper end of the intermediate shaft 112, a knob 114 for opening / closing operation integrated with the outer periphery of the upper portion of the operating shaft 113, and an operating shaft 113 protruding from the top of the operating shaft 113. A spring 115 for separating the intermediate shaft 112 and the operating shaft 113 from each other.
It consists of

The state shown is a through hole 1 formed through the ball 111.
11a is in a state where the upstream side and the downstream side of the gas are in communication, and the gas is flowing. To close the flow path from this state, push the knob 114, connect the operation shaft 113 to the intermediate shaft 112, and rotate in one direction, the ball 111 rotates to intersect the flow hole 111a,
Close the flow path.

The solenoid 108 is a case 116 fixed to the lower surface of the valve housing 103 via a screw or the like, a solenoid coil 117 fixedly arranged in the case 116, and the aforementioned signal cable 10 drawn out from the solenoid coil 117 to the outside. A magnet 118 provided above the solenoid coil 117, and a plunger 119 slidably arranged in the center of the solenoid coil 117 and penetrating the valve housing 103 and projecting inward.
The valve body 107 is integrated with the tip of the plunger 119.

Then, with the solenoid coil 117 in a non-excited state, the attraction force of the magnet 118 attracts the plunger 119 to the lower side,
The plunger 119 is urged to project by the repulsion in the excited state.

A spring receiver 120 is provided around the protruding end of the plunger 119 on the valve housing 103 side. The spring receiver 120 and the inner bottom surface of the valve housing 103 on the outer periphery of the plunger 108 assist in urging the plunger 108 to protrude upward. The spring 121 is interposed.

An E-ring 122 is fixed to the base of the protruding portion of the reset rod 109 on the housing 103 side to prevent the reset rod 109 from coming off, and a reset button 123 is integrated on the outer upper end of the housing 103. In addition, a return spring 124 is provided between the reset button 123 and the top of the housing 103.
The reset bar 109 is constantly urged upward by inserting the.

Although illustration is omitted, by disposing a protective cap such as a transparent cap on the outer periphery of the reset button 123, erroneous operation in a normal state can be prevented.

Although not described, the valve housing 10 of each component
Naturally, as shown in the drawing, a seal member such as a packing or an O-ring for maintaining airtightness is arranged at the penetrating portion and the flow path blocking portion with respect to 3.

Next, the operation of the stop valve 1 having the above configuration will be described.

When the detector 9 detects a gas leak, the detection output excites the solenoid coil 117 via the signal cable 10, the magnetic force of the magnet 118 is neutralized, and the plunger 119 is projected by the urging force of the auxiliary spring 121. Disc 107
Is pushed up, abuts on the nozzle portion 106, and blocks the flow path.

When the gas appliance 8 side returns to normal while the shut-off action of the valve element 107 continues, and the indoor gas is ventilated, the alarm operation of the gas leak alarm 9 ends. When the current state is restored, the reset button 123 is pushed and the reset rod 109 is lowered to push down the valve body 107 to separate it from the nozzle portion 106. Then, the plunger 119 is held by the magnet 118, the valve body 107 returns to the original position shown in the figure,
Gas is normally distributed.

<Effects of the Invention> As described in detail with reference to the embodiments above, according to the present invention, the pipe connection can be simplified and the connection can be made simpler than the conventional one in which a single gas shutoff valve is incorporated into a gas pipe. There is no decrease in reliability or strength due to the increase in the number of parts, and it can be installed at low cost.

Furthermore, the wiring for the detector may be indoor wiring, and even when the product of the present invention is attached to an existing gas pipe, it can be easily replaced by simply replacing it with a conventional stop valve.

Furthermore, since the reset rod extends on the side opposite to the plunger of the shutoff valve and does not interfere with the plunger, the structure of the operating portion of the reset rod can be extremely simplified. Moreover, since the reset rod is simply a thin rod for pressing the valve body, the portion where the reset rod penetrates the valve housing can be sealed with a simple and inexpensive sealing member such as an O-ring. Further, since the solenoid is provided outside the valve housing, electric sparks are not generated in the gas flow passage, and explosion-proof safety can be achieved.

Therefore, there is a remarkable effect that the structure can be extremely safe, inexpensive and simple.

[Brief description of drawings]

FIG. 1 is an explanatory view of gas piping using a shutoff valve built-in shutoff valve according to the present invention, and FIG. 2 is a sectional view of the shutoff valve. 1 ... Shut-off valve built-in stop valve 101 ... Gas supply port 102 ... Gas discharge port 103 ... Valve housing 104 ... Cock portion 106 ... Nozzle portion 107 ... Valve body 108 ... Solenoid 109 ... Reset rod 118 ... Magnet 119 ... Plunger 121 ... Auxiliary spring

Claims (1)

[Scope of utility model registration request] 1. A shutoff valve having a cock for manually opening and closing a gas flow passage in a valve housing and having a shutoff valve for opening and closing the gas flow passage through a valve seat in response to an abnormal signal from the outside. A built-in shutoff valve, comprising the shutoff valve and a reset rod arranged in the valve housing so as to face the shutoff valve, the shutoff valve having a valve body provided so as to face the valve seat. , A plunger that guides the valve body in a direction to move toward and away from the valve seat, a magnet that holds the valve body away from the valve seat through the plunger, and a valve body that contacts the valve seat. Is provided outside the valve housing and neutralizes the magnetic force of the magnet in the event of an abnormality so that the valve body is brought into contact with the valve seat by the biasing force of the auxiliary spring. solenoid The reset rod extends in the direction opposite to the plunger with one end facing the valve body and moves in the axial direction with the other end exposed to the outside of the valve housing. A shut-off valve built-in shut-off valve, which is freely provided and is configured to push and move the valve body to a position where the magnet can be held by an external pushing operation.